package NowCoder.UnderlyingPrinciple;
abstract class A{
    abstract void say();
}
public class 单选_7_6_5 extends A{

    @Override
    void say() {

    }
    public 单选_7_6_5(){

    }

    public static void main(String[] args) {
        单选_7_6_5 n = new 单选_7_6_5();
    }
}
